Alloys having high mechanical, chemical, and electrical resistance



UNITED STATES PATENT. OFFICE.

ARBIGO 'rnnnsco, or 'rnmu, ITALY, ASSIGNOR TO SOCIETA ANONIMA s rnmtmnn'rr BIAK, TURIN. ITALY, A COMPANY OF ITALY.

. i ALLOYS HAVING BIG]; MECHANICAL, CHEMICAL. AND ELECTRICAL RESISTANCE.

1,351,S11. Specificationbfletterslatentrate icd's'eiat. 7,1920.

N0 nrawin Application filed March 6, 1919. Serial No. 281,084. i

To all whom'it may concern: about 0.600-f and has}; very st n Beit' known that I, Anmeo Tnnnsco, subsistance to the corrosive .action of a number 'ect of the King of Italy, and resident of of acids.

urin, Italy, have invented certain new and In fact, a plate made with an alloy ac- 50 5 useful Improvements in Alloys Having High cording to this invention, exposed for 12 Mechanical," Chemical, and ElectricalrR-ehours to the action of sulfuric acid of 15 -s istance-,=jof whiclrthe-following is' a speci--- Be. at a temperature of C. hasfnot been r ficat'ion'. I I I corroded; this plate trcat'ed for'the same 'This invention?ha forit/s object the protime with sulfuric acid of 50 B. at a tefil- .35

'10 ductiorifioii a copper n ckel alloy having cerperature of 50 C. has shown a weight retain markedcharacteristics, and particularly \duction of about 0.00 milligram per sq. cm. good technologdc l characteristics,associated Generally speaking, this alloy is' satisfac with a hi 'h resis, ance to the chemical action. torily resistant to sulfuric acid of any Q of a number'of acids. A g I strength and. at temperatures under 100 15 The alloy according tothe invention is a without being materially corroded. i v, nickel-copper :alloy and consists of nickel in The resistance of the alloy to a number ofproportion'amountin'g to nearly one half of other acids is hereinafter mentioned:

the final alloy, a portion of the copper being Hydrochloric acid: The alloy resists this exchanged-for iron and a portion for a rare acid in any strength and at any temperm 20' metal such as tungsten or titanium. ture:

' 45- 'An alloy of the type described shows a re Thepercentage ofth'e metals forming the Acetic acid: As above; alloy may vary withinthe limits set forth Citric acid: As above; below, according to .the particular use for Tannic acid: As above; Nitric acid: The alloy resists satisfactorily 7Q the action of cold nitric acid up to a concen-' which the alloyis intended:

Copper from 3a to 44 ;per cent. N t Iron, frhm 1.5 to 4.75 3- f c5315. Tungsten fidm y: 6 c; n a 0 also as satis actory resistance Nickel j fi to nitro-sulfuric acid.

. Therefore these alloys are particularly F 52) By? way ofex ainple the following compoadapted for cases in which is required a high: sition may be given as'const tuting an alloy resistance to chemical action as well-as either in accordance with the invention: r a high resistance to mechanicalstress'es or a highelectrieal resistance orboth.- gig P 2 What I claim and desire to secure by s 35 en 3 United States Letters Patent is: 5 Nick? 54: a An alloyhaiing high mechanical, chemical and electrical resistance, comp'rlsing Alloys of such composition, in cast c0ndi nickelin proportion of about one half of the tion, have a tensile strength of about 55 final alloy, copper inproportion between 35 40 kilos per sq. and an elongation of about and 44 per cent. iron in proportion b'ctweenfi I 20 per cent.; they ma be forged and rolled 1.5 and 4.7 5 per cent. and tungsten in proboth cold and hot. flier drawing in some portion between 3 and 0 per cent. cases the tensile strength exceeds kilos Signedat Turin, Italy, thi 11th. day of per sq. mm. February A. D. 1919; I

sistance to' the flow of electric current of h ARRIGO TEDFECO. 

